ぽっくり [ pokkuri ] — dying suddenly / to "pop off" in one's sleep / onomatopoeic or mimetic word

The Japanese prize 空気を読む [ くうき を よむ / kuuki wo yomu ] — the ability to read the situation; sense the mood; read the room. Consequently they tend to put the group before the individual.

One result is the desire not to be an economic burden on one's family as the end of life approaches.

Also the idea of a lingering, pain ridden illness is to be avoided; hence the desire for a "sudden" and relatively easy death.

The Japanese, being practical and pragmatic, have number of shrines and temples offering pokkuri prayers.

And there are multiple pokkuri versions of kami and Buddhist deities — Amida, pokkuri Benten, pokkuri Jizo, korori Kannon, pokkuri Daishi and pokkuri tengu.

On a related note, there is sudden unexplained cardiac death known as "Pokkuri Death Syndrome" (PDS) in Japan. This apparently mainly occurs in healthy young Asian men while they're sleeping.

So good night, sleep tight, and hopefully you'll wake in the morning.